Note 7 - Stock-Based Compensation (Details) - Stock Options (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	12 Months Ended
	Jan. 01, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options [Abstract]
Outstanding at January 1, 2012	4,863,000	1,356,000	3,813,000	4,863,000
Outstanding at January 1, 2012	$ 15.31	$ 15.86	$ 15.62	$ 15.31
Outstanding at January 1, 2012	3 years 146 days	1 year 73 days	1 year 328 days	2 years 219 days
Outstanding at January 1, 2012	$ 8,817	$ 25,506	$ 25,380	$ 8,817
Shares		590,000	1,356,000	3,813,000
Weighted-Average Exercise Price		$ 15.80	$ 15.86	$ 15.62
Weighted-Average Remaining Contractual Term	3 years 146 days	1 year 73 days	1 year 328 days	2 years 219 days
Aggregate Intrinsic Value		20,039	25,506	25,380
Options exercisable at December 31, 2014 and expected to vest		590,000
Options exercisable at December 31, 2014 and expected to vest		$ 15.80
Options exercisable at December 31, 2014 and expected to vest		1 year 73 days
Options exercisable at December 31, 2014 and expected to vest		20,026
Options exercisable at December 31, 2014		568,000
Options exercisable at December 31, 2014		$ 15.92
Options exercisable at December 31, 2014		1 year 73 days
Options exercisable at December 31, 2014		$ 19,221
Options granted (1)		171,000		178,000	[1]
Options granted (1)				$ 15.63	[1]
Shares		(742,000)	(2,446,000)	(1,152,000)
Weighted-Average Exercise Price		$ 16.09	$ 15.49	$ 11.62
Shares		(24,000)	(11,000)	(76,000)
Weighted-Average Exercise Price		$ 10.07	$ 15.27	$ 20.90

[1] Includes 171,000 options granted as a result of the equity award modification. See "Equity Award Modifications" above for further discussion.